Q: A little oil in radiator?

asked by on

I just bought an old jeep an removing the radiator I found a little oil in the radiator

My car has 115000 miles.
My car has a manual transmission.

Since you have a manual transmission, there are no transmission oils going into a cooler in the radiator. The only way coolant and oil can mix is from the engine oil getting into the coolant passing in the engine. This can happen due to a leaking head gasket, or corrosion in the head or block eating through the gasket or metal part.

A pressure test on the radiator may point out the leak in the head or block. If it does not, then the leak is internal and may require the engine to be disassembled and pressure tested. If you want to have this diagnosed by a professional, a certified technician from YourMechanic can come to your car’s location to inspect your system for oil leaks and advise you on a repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. A little oil in radiator?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Heat only works when accelerating

Hello. I suspect the heater control valve is the culprit here. Most likely only opening partially. By only being partially open, it allows more hot water to circulate when the engine load and RPM are higher, as when you accelerate,...

Q: Is my 2012 Jeep Totaled?

To know if your Jeep is totaled, it would need to be inspected firsthand by collision estimator or appraiser. However, given your description of the damage and the fact that your vehicle is worth approximately $8,000 according to KBB, I...

Q: The 3rd and 4th cylinder are fouling the spark plugs. What could be the problem?

Hello there, it sounds like you have several different issues going on with your 1989 Chevrolet S10. You did great replacing the spark plugs to address the misfire issue as this commonly is the cause. If the problem persists or...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.